Hi Alain, I don't have a way to disable it. This functionality is built into the native full screen behavior in OS X.

Citrix Receiver Cleanup Utility. Citrix Receiver for Mac. IPhone / IPad. Citrix Receiver for IOS. Citrix Receiver for Android.

You can see this by going into full screen with other apps, like Safari. I do understand where you are coming from however as most apps don't have things that need to be clicked that close to the top of the screen, or they have a toolbar that would prevent accidental menu bar showing from happening. That said, I can offer you a solution that involves increasing the amount of time required before the menu bar auto shows. Before going into details, however, I must warn you that this solution is not supported. The reason it is not supported is that the API required to change the menu bar auto show delay is undocumented. Apple has not exposed this publicly, although they do use it in their own apps (Screen Sharing being the primary example). I've tested it and it works on 10.9 and 10.10 but it could break anytime Apple releases an update to OS X.

With that out of the way, here is what you can do to change the menu bar auto show delay: • Open /Applications/Utilities/Terminal.app • Run: defaults write com.citrix.receiver.nomas MenuBarAutoShowDelayEnabled -bool YES • Run: defaults write com.citrix.receiver.nomas MenuBarAutoShowDelay -float 3.0 The 3.0 at the end of the second command is the delay, in seconds, before the menu bar will auto show when the mouse is near the top. You can change this value to whatever feels the best for you.

If you ever want to disable it again, just run: defaults write com.citrix.receiver.nomas MenuBarAutoShowDelayEnabled -bool NO I hope this helps. 4k for mac video card.